Flask



FIG. 1 is a perspective view of a flask showing a first embodiment of our new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a perspective view of a flask showing a second embodiment of our new design;

FIG. 9 is a rear elevation view thereof;

FIG. 10 is a front elevation view thereof;

FIG. 11 is a left side elevation view thereof;

FIG. 12 is a right side elevation view thereof;

FIG. 13 is a top plan view thereof;

FIG. 14 is a bottom plan view thereof;

FIG. 15 is a perspective view of a flask showing a third embodiment of our new design;

FIG. 16 is a rear elevation view thereof;

FIG. 17 is a front elevation view thereof;

FIG. 18 is a left side elevation view thereof;

FIG. 19 is a right side elevation view thereof;

FIG. 20 is a top plan view thereof; and,

FIG. 21 is a bottom plan view thereof.

The broken lines immediately adjacent the shaded areas represent bounds of the claimed design and environment while all other broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design. 

The ornamental design for a flask, as shown and described. 